cauderay



(No Model.) 2 Sheets-Sheet 1. J. OAUDERAY.

BLEGTRIG METER.

No. 431,248. Patented July '1, 1890.

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(No Model.) 2 Sheets-Sheet 2.

- J. CAUDERAY.

ELECTRIC METER.

No. 431,248.- PatentedJuly l, 1890.

UNITED STATES PATENT OFFICE.

JULES CAUDERAY, OF PARIS, FRANCE.

ELECTRIC METER.

' SPECIFICATION forming part of Letters Patent No. 431,248, dated July 1, 1890;

Application filed August 1'7. 1889. Serial No. 321,077. (No model.)

To all whom, it may concern.-

Be it known that I, JULEs OAUDERAY, a citizen of Switzerland, residing at 1 Avenue Laumiere, in the city of Paris, in the Republic of France, have invented certain new and useful Improvements in Apparatus for Measurin g Electricity; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will' enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

My invention relates to apparatus for measuring electric currents and registering the results of such measurements.

The present invention is in the nature of an improvement upon or modification of the apparatus for which Letters Patent of the United States were issued to me hearing date the 12th day of July, 1887, and numbered 366,202, the improvement consisting in a simplified construction of the mechanism by which the throw of the lever actuating the register-train is controlled and determined.

Figure 1 is a side elevation of so much of the apparatus as is necessary to illustrate and explain the present invention; Fig. 2, a top plan view of the same; Fig. 3, a side elevation, and Fig. 4 a bottom plan view of a modified form of the apparatus.

The essential feature of the present invention is a cam-shaped or eccentric plate or bar, controlled as to its position by an ampere meter, WVatt meter, or equivalent measuring device, and extending into or across the path of the arm or lever carrying the dog or pawl which gives motion to the ratchet wheel, through which the register-train first receives motion.

Inasmuch as the present invention relates only to the mechanism thus indicated, the drawings and description are confined thereto, all other parts being of known and well-um derstood construction.

Referring now to the drawings, M indicates the balance-staif or arbor of a time-measuring device, which under the present arrange ment is designed to make one oscillation or movement forward and back each second, as

in my former patent above referred to; but this movement may be produced in any manner desired. The shaft M carries at a suitable point in its length a cam or eccentric m, which bears against and moves an anti-friction roller f carried by a lever F, pivoted in a suitable support in the framing of the instrument. The lever .F carries at one end a spring pressed dog or pawl f, which engages with and on its forward movement gives motion to a ratchet-wheel G, which is secured to the stem or spindle of a screw or worm H of a suitable registering train or device, the multiplying-wheels, indicators, 850., being of the ordinary and well-known construction. The opposite end of lever F carries a counterbalance-weight f, as indicated in Fig. 2. As above stated, the outward or forward movement of the lever F andits pawl or dog f is produced through the action of the eccentric or cam-like projection m acting upon the roller f of the lever, and its return movement is effectedby means of a light spiral spring f attached at one end to the lever F and at the other end to the frame-work of the instrument, asalso shown in said Fig. 2. The outward movement or throw of the lever F and its dog or pawl f is of course unvarying; but its return movement is controlled and varied by means of a cam-shaped or eccentric plate or bar D, which may be either smooth or stepped on its outer surface, it being represented as stepped in Fig. 1 and as smooth in Fig. 3, which latter represents the same device in a slightly-modified apparatus. The bar or plate D is carried by a suitable light frame from a shaft or arbor O, which is advisably carried upon conical points or other suitable supports, permitting the free oscillation of the shaft. Secured to the main shaft or arbor O is abar or rod B, of soft iron, which extends into the open interior of a fixed bobbin or coil'A, of insulated wire or other electric conductor, as shown in Figs. 1 and 2. The

bar or rod B is moved or displaced according to theintensity of the current passing through the coils of the bobbin A, and as it moves it causes the shaft 0 to rock or turn and to carry with it the bar or plate D in a manner that will be readily understood upon referring to Figs. 1 and 2. The outer face of plate or bar D is arranged directly in rear of the outer or pawl-carrying end of lever F, and moves at rlght angles to the path of said lever. The outer surface of the bar or plate D being eccentric to the axis of shaft 0, it follows that upon the position of bar or rod B, andthe consequent position of plate or bar D, will depend the backward movement of the lever F occasioned by the spring f The extent of the backward movement of lever F determines the number of teeth of ratchet-wheel G over which the pawl or dog f shall ride in its backward movement, and consequently the dis tance that said wheel shall be movedforward upon the return or outward movement of lever F, produced through the oscillation of staff or arbor M and the action of the cam or eccentric m of the time-measuring device.

The bar or rod B, the plate or bar D, and the I supporting frame-work or carrying-arms of the latter are counterbalanced and placed in equilibrium by means of a counter-weight secured to an arm projecting rearwardly from or to the opposite side of shaft or arbor C, as shown in Figs. 1 and 2.

In Figs. 3 and 4 I have illustrated a slight modification of the above apparatus, the essential features, however, remaining the same. In said figures, G indicates the ratchet-wheel commanding the gear-train, and N a lever attached to a sleeve 0, concentric with the axis of wheel G, the sleeve also being provided Wlth a radial arm F, carrying a spring-pressed dog or pawl f, which engages with the teeth of ratchet-wheel G, and impartsmotion thereto when the arms N and F move in the proper direction. The arm N is normally drawn down or forward by means of a spring M, by reason of which the forward end of the arm Nor an anti-friction roller n, carried thereby,

consequently the arm F and pawl f are ateach oscillation or rotation of the staff or arbor M carried to the same height. The descent of the arms N and Fis, however, varied and determined by means of a plate or bar D, the outer bearing-face of which is curved eocentrically to the axis of its supportingshaft or hub O, as shownin Fig. 3. The outer face or bearing-surface of the plate or bar D is arranged to move beneath a downwardlybent end of the arm or lever F, and to limit the descent thereof, and consequently the descent of arm N. The distance that the arms may be drawn downward or forward by the spring '17, when the cam or eccentric on permits such downward movement is therefore limited and determined by the plate or bar D, and consequently the forward movement of the pawl f and of the ratchet-wheel G will be similarly determined.

It will be observed that the construction represented in Figs. 3 and i is to all intents and purposes the same as that represented. in Figs. 1 and 2, except that in the first two figures the forward or actuating movement of the lever is positively effected and the return movement is produced by the spring; whereas under the second arrangement described the forward or actuating movement is produced by the spring and the return movement is positively effected. Underv the construction above set forth the measuring device is entirely independent of the registering device, and hence its delicacy of action is in no degree affected by the latter, which is a feature of great importance in apparatus of this character.

Having thus described my invention, what I claim is In combination with an ammeter or electric indicator A B and with the ratchet-wheel lever, and bar or .plate D, carried by the shaft or arbor O of the indicator or ammeter, and having an outer face eccentric to the axis thereof arranged across the path of the lever F and adapted to limit its movement.

In testimony whereof I affix my signature in presence of two witnesses.

J ULES CAUDERAY.

Witnesses:

G. DE MEsTRAL, J. L. RATHBONE. 

